BL Touch probe input not working
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The LED on the touch is showing the right thing.
Ok, should I delete the deploy and retract macros that I so painstakingly
created?The deploy and retract macros should only have the servo commands to deploy and retract the pin.
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I am commissioning and don't want to slam it into the bed. The wiki says to do these tests and watch the probe value change to 0 and then 1000 when triggered. Mine is always 1000.
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If you set the probe into test mode and touch the probe what does the DWC show?
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the macros do only have the servo commands but are they no longer needed with 1.21 or should I leave them.
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P120 test mode? if so, it stays at 1000 while the probe extends and retracts until cleared.
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the macros do only have the servo commands but are they no longer needed with 1.21 or should I leave them.
They still need to be there, you just don't have to call them in other macros now, you can just use M401 and M402.
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Hmm, I have this for endstops: M574 X1 Y1 Z0 S1
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P120 test mode? if so, it stays at 1000 while the probe extends and retracts until cleared.
But does it change when you touch the pin to simulate a trigger?
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Hmm, I have this for endstops: M574 X1 Y1 Z0 S1
Take out the Z0 and add another command to specify the Z
like so
[c]M574 X1 Y2 S0 ; Set active-low switches, low end endstop for X, high end endstop for Y, add Z2 for Zmax
M574 Z1 S2 ; Use zprobe and home to min[/c] -
The Z-probe status in the DWC isn't very helpful with the BLTouch. It triggers and releases so fast it's hard to see it flash.
But as long as it actually stops the bed from traveling it'll work just fine.
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I'm kind of stuck between a rock and a hard place. I can't test probing until I home and homing will kill my pristine new PEI if it fails on Z.
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Ok, I homed X and Y individually and then attempted to home Z. I saw the probe descend and then retract with thisL
G28 Z
Error: Z probe already triggered at start of probing move
Error: G0/G1: insufficient axes homed -
I'm kind of stuck between a rock and a hard place. I can't test probing until I home and homing will kill my pristine new PEI if it fails on Z.
Test it from a few 100mm height and trigger it by hand before it gets close to the bed.
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I notice you don't have inverted signal in your M558. Wiki says to invert.
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What does your HomeZ.g look like?
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Ok, it is working. Removed the invert on M558 and actually tested rather than watch the DWC display. A finger push triggers the probe, Z stops moving. Should be good to go from here, thank you!
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I notice you don't have inverted signal in your M558. Wiki says to invert.
Technically it only talks about inverting. The example of the M558 command doesn't have it. The inversion they talk about refers to the servo command only. Though that's not made clear or explicit in the wiki. I ran into that at first too.
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home.g
G91
G1 Z5 F800 S2
M401
G90
G1 X120 Y125 F2400
G30
M402
G1 Z2 F200 -
Your M558 command should look something like this to get decent repeatability out of the BLTouch.
[c]M558 P9 X0 Y0 Z1 H5 F100 T4000 A10 R0.5 S0.008 ; P9 for BLTouch, dive height 5mm, probe at 100mm/s, travel 4000mm/s, probe until 2 consecutive probe results are to within S up to 10 probes, pause 0.5s, Reprobe until 0.008 repeatability[/c]
Here's what I'm using for HomeZ on my CoreXY.
[c]
; homez.g
; called to home the Z axis
;; BLTouch prep so we don't catch the probe pin on the edge of the bed
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M280 P3 S160 I1 ; Alarm Release and Push-Pin UP just in case it's in alarm and deployed
G4 S1
M402 ; Retract probe just in case it's down
G4 S0.5; Drop the bed for travel
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G91 ; Relative positioning
G1 Z5 F200 S2 ; Lower bed 5mm to ensure it is below the switch trigger height; Move probe into position
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G90 ; absolute positioning
G1 X200 Y140 F4000 ; Move x and Y axis over to bed center so probe is on top of bed; Set lower speeds for homing
M566 Z10 ; Set maximum instantaneous speed changes (mm/min) (Jerk)
M203 Z400 ; Set maximum speeds (mm/min)
M201 Z100 ; Set maximum accelerations (mm/s^2); Probe the bed
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M558 A1 F400 ; Set single probing at faster feed rate
G30 ; Do a single probe to home our Z axis
M558 A10 F100 ; Set more accurate probing at slower feed rate
G30 ; Probe again to get a more accurate position; Set normal speeds again
M566 Z15 ; Set maximum instantaneous speed changes (mm/min) (Jerk)
M203 Z500 ; Set maximum speeds (mm/min)
M201 Z300 ; Set maximum accelerations (mm/s^2); Move X and Y back Home
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G1 X0 Y285[/c]I also use this as a macro to calibrate the probe trigger height
[c]; Clear compensation map and Zprobe trigger height
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M291 P"Grid bed compensation map and ZProbe trigger height will be cleared. Ok or Cancel?" R"WARNING" S3 ; User must click OK or cancel.
M561 ; Disable any current bed compensation
G29 S2 ; Clear mesh bed compensation perameters
G31 Z0 ; Reset zprobe trigger height; home all axis
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G28 ; Home all axis
G90 ; Absolute positioning
T0 ; Activate first tool; Set lower speeds for Z homing and lower Z motor current
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M566 Z10 ; Set maximum instantaneous speed changes (mm/min) (Jerk)
M203 Z400 ; Set maximum speeds (mm/min)
M201 Z100 ; Set maximum accelerations (mm/s^2)
M906 Z900 ; Drop motor current to prevent damage in case of head crash; Preheat to probing temps
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M291 P"Preheating to bed to 60 and nozzle to 210 for accurate probing"
M104 S210 ; Set nozzle to 210 and release
M190 S60 ; Set bed to 60 and wait
M109 S210 ; Set nozzle to 210 and wait; Move nozzle to center of bed at z10
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M291 P"Nozzle will now move to center of bed to reset Z0 and calibrate probe" S3
G1 Z1 ; Drop bed for nozzle clearance
G1 X155 Y140 Z2 F4000 ; Move to bed center; Reset z to 5 to allow jogging up to touch bed to nozzle
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G92 Z5; Dialog to allow user to jog z to touch nozzle to bed gently and then move Z down 10
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M291 P"Jog the Z Axis until the bed and nozzle are touching and click OK" R"Setting Z=0" Z1 S3
G92 Z0 ; Set z = 0; Move probe to center of bed and get probe trigger heights
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M291 P"Probe will now move to center of bed and measure trigger height 10 times" R"ZProbe Trigger Height Calibration" S3
G1 Z1 ; Drop bed for nozzle clearance
G1 X200 Y140 F4000 ; Move to bed centerM291 P"Heights will be found in gcode console if logging successful gcode is enabled" R"Did you remember to enabled gcode logging?" S3
; G30 S-1 10 times
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; 1
G1 Z10
G30 S-1; 2
G1 Z10
G30 S-1; 3
G1 Z10
G30 S-1; 4
G1 Z10
G30 S-1; 5
G1 Z10
G30 S-1; 6
G1 Z10
G30 S-1; 7
G1 Z10
G30 S-1; 8
G1 Z10
G30 S-1; 9
G1 Z10
G30 S-1; 10
G1 Z10
G30 S-1M291 P"Probing complete. Turning off heaters and homing axis. Check log for trigger heights and enter into config.g" S2
; Turn off heaters
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M104 S0 ; Set nozzle to 0 and release
M140 S0 ; Set bed to 0 and release
M906 Z1500 ; Return Z motor current to normal
G28 ; Home all; Tone to get user attention
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M400 ; Clear movement buffer so tones play reliably
M300 S666 P500
G4 P501
M300 S1111 P300
G4 P301[/c] -
Ok, probing working and Z offset calibrated.
I'm a delta guy and this is my first Core XY and first BL Touch. I use FSRs on my 7 deltas and IR on a couple of other printers.
The whole "homing" thing is more complicated on the Core XY. I'll look over your home.g - thanks.
